The date and time of the compressed file, as stored within the gzip archive.
FileCompressedDate contains the last modified date of the file, as stored within the archive (it does not generally correspond to when the file was compressed).
FileCompressedDate is returned in a platform-specific format. The Java and other editions will return the number of milliseconds since January 1, 1970, 00:00:00. This value may be passed directly to the java.util.Date constructor to create a java.util.Date object representing this date.
The .NET Edition will return the number of ticks, or 100-nanosecond intervals, since January 1, 0001, 00:00:00. This value may be passed directly to the System.DateTime constructor to create a System.DateTime object representing this date.
This property is read-only and not available at design time.